Indian Duct Upper 2639704

Genuine Indian Duct Upper — OEM Part #2639704

The wrong bolt or washer can strip threads or vibrate loose. The genuine Indian Duct Upper (part #2639704) is the exact factory hardware for the Indian Chieftain PowerPlus Dark Horse 108, Chieftain PowerPlus Dark Horse 112 and other Chieftain, Roadmaster and Springfield models.

Small hardware holds every major part of your Indian together. The right thread, length, hardness and finish keep parts tight, sealed and vibration-free. This part is confirmed for 9 Indian models from 2025 to 2026. See the full fitment list below.

Indian Duct Upper at a Glance

• OEM part number: 2639704
• Brand: Indian Motorcycle (genuine OEM part)
• Part type: Fairing
• Note: Includes Grommets
• Fits: Indian Chieftain, Roadmaster and Springfield models, 2025–2026
• Condition: New

Indian Models and Years This Duct Upper Fits

Genuine Indian part #2639704 fits the models and years below. To be certain, match the part number to the factory parts diagram for your bike, or contact us with your VIN before ordering.

Indian Chieftain, Roadmaster and Springfield Fitment

Why Choose a Genuine Indian OEM Duct Upper?

• Exact thread, length and hardness
• Factory finish that resists corrosion
• Keeps parts tight under V-twin vibration
• No guessing at hardware-store sizes
• Made to the same specifications as the part installed at the factory, not an aftermarket copy
• Sold by Witchdoctors, an Indian Motorcycle OEM parts source with factory part numbers and diagrams for every listing

Every Indian, from the Chief and Chieftain to the Challenger, Scout and FTR, is engineered as a complete system. Genuine OEM parts keep your bike correct, reliable and easier to sell. Learn more in our Indian motorcycle parts guide.

Features and Materials

Key Features

• Genuine Indian Motorcycle OEM part #2639704
• Factory dimensions and grade
• Matching chrome, black or zinc finish
• Direct replacement for the listed models

Materials and Construction

Indian hardware is made from heat-treated steel, stainless steel or brass with zinc, black oxide or chrome finishes. Bushings, grommets and O-rings use rubber or polymer compounds.

Common Reasons Riders Replace This Part

• Replacing lost or rusted fasteners
• Completing a repair with new hardware
• Restoring factory finish and fit
• Replacing single-use fasteners

Signs Your Duct Upper Needs Replacing

• Stripped, rusted or missing fasteners
• Rattling parts
• Leaks at O-rings or seals
• Cracked grommets or bushings

Installation Tips

1. Confirm the part number matches the diagram location.
2. Clean the threads and mating surfaces.
3. Apply thread locker or lubricant only where the manual says.
4. Torque to the factory spec.
5. Recheck after the first ride.

Not sure whether to do it yourself? Read when to seek professional help or DIY before you start.

Indian Parts Diagrams for This Part

Browse all Indian motorcycle parts diagrams to find part #2639704 for your model.

Related Indian OEM Parts

Doing the job right? These genuine Indian parts fit the same bikes and are often replaced at the same time:

• Indian Fairing Tray Left (#5465822)
• Indian Outer Fairing, Bronze Smoke (#5465313-731)
• Indian Outer Fairing, Spirit Blue (#5465313-694)
• Indian Outer Fairing, Black Smoke (#5465313-866)
• Indian Outer Fairing, Black Metallic (#5465313-800)
• Indian Fairing-Lower, Inner, Left (#2638903)

Recommended Accessories and Maintenance Supplies

Pair your Duct Upper with these parts and supplies:

• Indian maintenance essentials — Filters, plugs, fluids and wear items
• Indian engine parts — Gaskets, seals, bearings and internal engine parts
• Bike-Brite cleaning products — Cleaners and detailing supplies
• Indian trunk and saddlebag repair parts — Hinges, latches, liners and trunk parts
• Indian OEM parts diagrams — find every factory part for your model

Helpful Guides from the Witchdoctors Blog

• The Mechanic's Handbook: A Guide to Popular Fasteners and Tools Used on Motorcycles and UTVs
• Replacing Motorcycle Gasket & Seal Tips
• How to Prepare Your Motorcycle for Winter Storage.
• Can You Ride a Motorcycle in The Rain?

Frequently Asked Questions

What is the OEM part number for this Indian Duct Upper?

The genuine Indian Motorcycle part number is 2639704. Use it to match this part to your factory parts diagram.

Which Indian models does part #2639704 fit?

It fits the Indian Chieftain PowerPlus 108 (2025); Indian Chieftain PowerPlus Dark Horse 108 (2025–2026); Indian Chieftain PowerPlus Dark Horse 112 (2025–2026); Indian Chieftain PowerPlus Limited 108 (2025–2026); Indian Chieftain PowerPlus Limited 112 (2025–2026); Indian Roadmaster PowerPlus Dark Horse 108 (2025–2026); Indian Roadmaster PowerPlus Dark Horse 112 (2025–2026); Indian Roadmaster PowerPlus Limited 108 (2025–2026); Indian Roadmaster PowerPlus Limited 112 (2025–2026).

Is this a genuine Indian Motorcycle part?

Yes. This is a genuine Indian Motorcycle OEM part, the same part number used at the factory, not an aftermarket copy.

How do I make sure this fits my bike?

Match part #2639704 to the parts diagram for your model and year, or send us your VIN and we will confirm it for you.

How many come in a pack?

Unless the title says otherwise, the price is for one piece.

Can I use a hardware-store bolt?

OEM hardware has the correct grade, length and finish. Generic hardware can loosen or rust.

Is this fastener single-use?

Some are. Check the service manual.

Order Your Genuine Indian Duct Upper Today

Ride with confidence on parts made for your bike. Order the genuine Indian Duct Upper, OEM part #2639704, from Witchdoctors today and keep your Indian Chieftain PowerPlus Dark Horse 108, Chieftain PowerPlus Dark Horse 112 and other Chieftain, Roadmaster and Springfield models running the way Indian designed it.

• How long will it take to receive my order?
• Shipping and return policy
• Questions about fitment? Contact us
• Shop all Indian OEM parts

Where to Ride Your Indian

Your Indian was built for the open road. These scenic routes are favorites with motorcycle riders. Check current road conditions, seasonal closures and park fees before you go.

• Natchez Trace Parkway — Mississippi, Alabama and Tennessee: 444 miles of low-traffic, history-filled parkway
• Going-to-the-Sun Road — Glacier National Park, Montana: a 50-mile alpine crossing of the Continental Divide